﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Windows;
using Lephone.Data;

namespace SimlvClient.Pages
{
    class FTPHelper
    {
        string ftpServerIP;
        string ftpUserID;
        string ftpPassword;
        FtpWebRequest reqFTP;
        private void Connect(String path)//连接ftp
        {
            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
            // 指定数据传输类型
            reqFTP.UseBinary = true;
            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        }
        public FTPHelper(string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            this.ftpServerIP = ftpServerIP;
            this.ftpUserID = ftpUserID;
            this.ftpPassword = ftpPassword;
        }
        //都调用这个
        private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            try
            {
                Connect(path);
                reqFTP.Method = WRMethods;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名
                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                // to remove the trailing '\n'
                result.Remove(result.ToString().LastIndexOf('\n'), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                downloadFiles = null;
                return downloadFiles;
            }
        }
        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
        }
        public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
        }
        public bool Upload(string filename, string FtpName) //上面的代码实现了从ftp服务器上载文件的功能
        {
            FileInfo fileInf = new FileInfo(filename);
            //string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
            string uri = "ftp://" + ftpServerIP + "/" + FtpName;
            Connect(uri);//连接         
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;
            // 缓冲大小设置为kb
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            try
            {
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = fs.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                fs.Close();
                return true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Upload Error");
                return false;
            }
        }
        public bool Download(string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
        {
            try
            {
                String onlyFileName = Path.GetFileName(fileName);
                string newFileName = filePath + "\\" + onlyFileName;
                if (File.Exists(newFileName))
                {
                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
                    return false;
                }
                string url = "ftp://" + ftpServerIP + "/" + fileName;
                Connect(url);//连接 
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                FileStream outputStream = new FileStream(newFileName, FileMode.Create);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                errorinfo = "";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法下载", ex.Message);
                return false;
            }
        }
        //删除文件
        public void DeleteFileName(string fileName)
        {
            try
            {
                FileInfo fileInf = new FileInfo(fileName);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接         
                // 默认为true，连接不会被关闭
                // 在一个命令之后被执行
                reqFTP.KeepAlive = false;
                // 指定执行什么命令
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "删除错误");
            }
        }

        #region  Update Page
        public void UpdatePage()
        {
            var ModelList = DbEntry.From<SimlvClient.Model.OperPageHistory>().Where(Lephone.Data.Condition.Empty).OrderByDescending(S => S.Id).Select().ToList();
            List<string> HasProcPage = new List<string>();
            var WebSiteModel = DbEntry.From<SimlvClient.Model.WebSites>().Where(Lephone.Data.Condition.Empty).Select().SingleOrDefault();
            foreach (var Model in ModelList)
            {
                try
                {
                    //IsSimple and Index
                    if (Model.IsSimple == 1 && Model.CateId == 0)
                    {
                        var SimpleModel = DbEntry.From<SimlvClient.Model.OperPageConfig>().Where(o => o.CateId == 0 && o.IsSimpleId == Model.DataId).Select().SingleOrDefault();
                        string Url = Directory.GetCurrentDirectory() + "\\" + "templete" + "\\" + SimpleModel.TempUrl;
                        FileInfo fileInf = new FileInfo(Url);
                        using (Stream fileStream = fileInf.OpenRead())
                        {
                            StreamReader reader = new StreamReader(fileStream);
                            String row = null;
                            StringBuilder sb = new StringBuilder();
                            do
                            {
                                row = reader.ReadLine();
                                sb.Append(row);
                                sb.Append(Environment.NewLine);
                            } while (row != null);

                            var NewsModel = DbEntry.From<SimlvClient.Model.News>().Where(o => o.Id == Model.DataId).Select().SingleOrDefault();
                            row = sb.ToString();
                            string uri = "ftp://" + ftpServerIP + "/" + SimpleModel.TempUrl;
                            if (!HasProcPage.Any(o => o.ToString() == uri))
                            {
                                Connect(uri);//连接         
                                reqFTP.KeepAlive = false;
                                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
                                row = ReplaceTagNews(WebSiteModel, row, NewsModel);
                                LastToFTP(fileStream, row);
                                //SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();
                                HasProcPage.Add(uri);
                            }
                            SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();
                        }
                    }
                    else if (Model.CateId != 0)
                    {
                        var HistoryList = DbEntry.From<SimlvClient.Model.OperPageConfig>().Where(o => o.CateId == Model.CateId && o.Operation == Model.OperName).Select().ToList();
                        foreach (var ListPageAndDetail in HistoryList)
                        {
                            string Url = Directory.GetCurrentDirectory() + "\\" + "templete" + "\\" + ListPageAndDetail.TempUrl;

                            FileInfo fileInf = new FileInfo(Url);
                            using (Stream fileStream = fileInf.OpenRead())
                            {
                                StreamReader reader = new StreamReader(fileStream);
                                String row = null;
                                StringBuilder sb = new StringBuilder();
                                do
                                {
                                    row = reader.ReadLine();
                                    sb.Append(row);
                                    sb.Append(Environment.NewLine);
                                } while (row != null);

                                var NewsModel = DbEntry.From<SimlvClient.Model.News>().Where(o => o.Id == Model.DataId).Select().SingleOrDefault();
                                row = sb.ToString();
                                string uri = string.Empty;
                                if (ListPageAndDetail.IsList == 1)
                                {
                                    uri = "ftp://" + ftpServerIP + "/" + ListPageAndDetail.TempUrl;
                                    row = ReplaceTagList(WebSiteModel, row, ListPageAndDetail);
                                }
                                else
                                {
                                    uri = "ftp://" + ftpServerIP + "/" + ListPageAndDetail.TempUrl.Replace(".html", "_" + Model.DataId.ToString() + ".html");
                                    row = ReplaceTagNews(WebSiteModel, row, NewsModel);
                                }
                                if (!HasProcPage.Any(o => o.ToString() == uri))
                                {
                                    Connect(uri);//连接         
                                    reqFTP.KeepAlive = false;
                                    reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

                                    LastToFTP(fileStream, row);
                                    //SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();
                                    HasProcPage.Add(uri);
                                }
                                SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();
                            }
                        }
                    }
                    else if (Model.CateId == 0 && Model.IsSimple == 0)
                    {
                        //index.html
                        var SimpleModel = DbEntry.From<SimlvClient.Model.OperPageConfig>().Where(o => o.CateId == 0 && o.IsSimpleId == Model.DataId).Select().SingleOrDefault();
                        string Url = Directory.GetCurrentDirectory() + "\\" + "templete" + "\\" + SimpleModel.TempUrl;
                        FileInfo fileInf = new FileInfo(Url);
                        using (Stream fileStream = fileInf.OpenRead())
                        {
                            StreamReader reader = new StreamReader(fileStream);
                            String row = null;
                            StringBuilder sb = new StringBuilder();
                            do
                            {
                                row = reader.ReadLine();
                                sb.Append(row);
                                sb.Append(Environment.NewLine);
                            } while (row != null);

                            var NewsModel = DbEntry.From<SimlvClient.Model.News>().Where(o => o.Id == Model.DataId).Select().SingleOrDefault();
                            row = sb.ToString();
                            string uri = "ftp://" + ftpServerIP + "/" + SimpleModel.TempUrl;
                            if (!HasProcPage.Any(o => o.ToString() == uri))
                            {
                                Connect(uri);//连接         
                                reqFTP.KeepAlive = false;
                                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
                                row = ReplaceTagNews(WebSiteModel, row, NewsModel);
                                LastToFTP(fileStream, row);
                                //SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();
                                HasProcPage.Add(uri);
                            }

                            SimlvClient.Model.OperPageHistory.FindById(Model.Id).Delete();

                        }

                    }
                }
                catch (Exception ex)
                {
                    //MessageBox.Show(ex.ToString());
                }
            }

        }



        private void LastToFTP(Stream fileStream, String row)
        {
            reqFTP.ContentLength = row.Length;
            Stream strm = reqFTP.GetRequestStream();
            // 每次读文件流的kb
            int BlockLength = 2048;
            if (row.Length > BlockLength)
            {
                bool CanSplitInt = true;
                if (row.Length % BlockLength > 0)
                {
                    CanSplitInt = false;
                }
                int BlockCount = row.Length / BlockLength + (CanSplitInt == false ? 1 : 0);
                for (int i = 0; i < BlockCount; i++)
                {
                    if (i != BlockCount - 1)
                    {
                        string Temp = row.Substring(i * BlockLength, BlockLength);
                        byte[] array = Encoding.UTF8.GetBytes(Temp); ;
                        strm.Write(array, 0, array.Length);
                    }
                    else
                    {
                        string Temp = row.Substring(i * BlockLength, row.Length - i * BlockLength);
                        byte[] array = Encoding.UTF8.GetBytes(Temp); ;
                        strm.Write(array, 0, array.Length);
                    }
                }
            }
            strm.Close();
            fileStream.Close();
        }


        private static string ReplaceTagList(Model.WebSites WebSiteModel, string row, Model.OperPageConfig Model)
        {

            var TagList = DbEntry.From<SimlvClient.Model.ListTemplate>().Where(o => o.TempId == Model.ListTempId).Select().ToList();

            foreach (var Tag in TagList)
            {
                if (row.Contains(Tag.TagName))
                {
                    var NewsList = DbEntry.From<SimlvClient.Model.News>().Where(o => o.CateId == Tag.CateId).Select().ToList();
                    StringBuilder ListContent = new StringBuilder();
                    foreach (var NewsModel in NewsList)
                    {
                        string TempTagContent = Tag.Content;
                        if (Tag.Content.Contains("{Id}"))
                        {
                            TempTagContent = TempTagContent.Replace("{Id}", NewsModel.Id.ToString());
                        }
                        if (Tag.Content.Contains("{NewsTitle}"))
                        {
                            TempTagContent = TempTagContent.Replace("{NewsTitle}", NewsModel.Title);
                        }
                        if (Tag.Content.Contains("{NContent}"))
                        {
                            TempTagContent = TempTagContent.Replace("{NContent}", NewsModel.NContent);
                        }
                        ListContent.AppendLine(TempTagContent);
                    }
                    row = row.Replace(Tag.TagName, ListContent.ToString());
                }
            }
            row = WebSite(WebSiteModel, row);
            return row;
        }

        private static string ReplaceTagNews(SimlvClient.Model.WebSites WebSiteModel, String row, SimlvClient.Model.News NewsModel)
        {
            if (row.Contains("{NewsTitle}"))
            {
                row = row.Replace("{NewsTitle}", NewsModel.Title);
            }
            if (row.Contains("{NContent}"))
            {
                row = row.Replace("{NContent}", NewsModel.NContent);
            }
            row = WebSite(WebSiteModel, row);
            return row;
        }

        private static string WebSite(SimlvClient.Model.WebSites WebSiteModel, String row)
        {
            if (row.Contains("{Title}"))
            {
                row = row.Replace("{Title}", WebSiteModel.Title);
            }
            if (row.Contains("{Keywords}"))
            {
                row = row.Replace("{Keywords}", WebSiteModel.Keywords);
            }
            if (row.Contains("{Description}"))
            {
                row = row.Replace("{Description}", WebSiteModel.Description);
            }
            return row;
        }
        #endregion
    }
}
